In a Controlled Experiment, ______________

question 6

Multiple Choice

In a controlled experiment, ______________

• A) you need only a single experimental organism which is tested again and again
• B) the researcher has several hypotheses, one of which will be proven correct
• C) the researcher knows the outcome before beginning the experiment
• D) the researcher controls for the effects of all variables except one
• E) the experimental organisms have all been used before and given good results

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Definitions:

Fovea

A small depression in the retina of the eye where visual acuity is highest, responsible for sharp central vision.

Lens

A transparent optical component that focuses or disperses light rays, used in devices like cameras, glasses, and microscopes.

Transparent Disc

A disc-shaped object made from a material that allows light to pass through it without scattering, making the material itself nearly invisible but still physically present.

Iris

The colored part of the eye that controls the size of the pupil and thus the amount of light that enters the eye.